diff --git a/test/references/references_test.rb b/test/references/references_test.rb
index 4a3c341..bb8dc27 100644
--- a/test/references/references_test.rb
+++ b/test/references/references_test.rb
@@ -1,6 +1,7 @@
 require 'erb'
 require 'rubygems'
 require 'test/unit'
+require 'securerandom'
 require 'twine'
 
 class TwineTest < Test::Unit::TestCase